Whisk together chicken broth, tomato sauce, Rotel tomatoes, and taco seasoning in the slow cooker.
Add black beans, corn, and pinto beans to the soup mixture.
Place chicken breasts in the center of the slow cooker and submerge with the ingredients.
Slow cooker on low for 6-7 hours or high for 3-4 hours or until the internal temperature reaches 165°F.
Remove cooked chicken from the slow cooker and shred. Return to the prepared soup.
Serve with avocado slices, jalapeno slices, sour cream, cilantro or salsa.
Place chicken broth, tomato sauce, Rotel tomatoes, and taco seasoning in a stock pot or Dutch oven. Whisk ingredients together.
Add black beans, corn, and pinto beans to the soup mixture.
Place chicken breasts in the center of the stock pot, and turn the heat to medium.
Cover and cook for 25-30 minutes or until the internal temperature reaches 165°F.
Remove cooked chicken from the stock pot and shred with two forks. Return to the prepared soup.
Serve with your favorite toppings.